Thermostatic water-valve.



1.]. FINNEY.

THERMOSTATIC WATER VALVE.

APPLICATION FILED rzs.2s.1913.

1 9 1 fi fi io Patented Sept; 14C, 1915.

f, 2 SHEETSSHEET lllllllllllllllllllllll. l IIIIUUE V I 40 39 I 9 l V llllllllllllll llfl lllllllllllll" J. J. FINNEY.

THERMOSTATIC WATER VALVE.

APPLICATION FILED FEB.28, 1913.

1, 153,5QJY, Patented Sept. 14, 1915.

Z SHEETSSHEET 2.

UNITED s'rarns rarnnr onrrcn JAMES J. FINNEY, or CHICAGO,- ILLINOIS, ASSIGNOR or THREE-FOURTHS T0 ROSCOE L.

' ,ROBERTS, or CHICAGO, ILLINOIS.

THERMOSTATIC WATER-VALVE.

Specification of Letters Patent.

Patented Sept. 14, 1915.

To all whom it ma concern:

Be it known that I, JAMES J. FINNEY, a

citizen of the United States of America, and

a resident of Chicago, county of Cook, and

State ofIllinois, have invented certain new and useful Improvements in Thermostatic ater-Valves, of which the following is a specification.

My invention relates to thermostatic water valves, and has for its object the construction of a valve which will deliver water atany temperature at which it may beset,

which it is desired the water shall be delivered.

My invention is illustrated in the accompanying drawings, in which' Figure 1 is a side elevation, partly in section of a valve suitable for wash basins; Fig. 2 is a section on line.22 of Fig. 1; Fig. 3 is a planof the top of Fig. .1; Fig. 4 is a front elevation of Fig. 1; Figs. 5' and 6 are sections on lines 5-5 and 66, respectively, of Fig. 2; Fig. 7 is a detail in elevation; and Fig. 8 is a section on line 88 of Fig. 2.

In the said drawings, 10 is a cylindrical casing connected by screw threads to a base 11 and a cap 12. In the base 11 are transverse openings 13 and 14 in which arev rotary valves 15 and 16, connected by levers 17 and 18 to a link 19 and handle 20 by which both valves are opened and closed simultaneously. The opening 13communicates with a hot water inlet 21, and the opening 14 communicates with a cold water inlet 22. The valves 15 and 16 close ports 23 and 24' leading into the interior of the casing 10.

. Resting on top of the base 11 and within the casing 10, is a block 46 having chambers 25 and 26 immediately above and in communication with the ports 23 and 24'."

The tops of these chambers are closed by perforated plugs 27 and 28 having seats for puppet valves 29 and .30.

valves are connected by stems to arms 31 and 32 pivoted on the plugs and bearing against a pear-shaped body 33 on stem 34. Springs under the puppet valves act to raise them and to keep the arms 31 and 32 at all times in contact with the body 33. These parts are so arranged that an upward movement of the body 33. acts to open valve 29 screw 38.

The puppet and close valve 30, while a downward movement of the body 33 acts to close the valve 29 and open valve 30.

On the upper end of the casing 10 is a head 35 held in place by the cap 12, and in th s cap is a rotatable nut 36 having. a pointer 37 secured to its upper end by :1 Between the head 35 and the pointer 37, and supported by the former, are a secondary head and a graduated dial 40. The dial 40 is marked by figures indicating temperatures at which it is desired and may be set for any temperature at water shall be discharged, andthe pointer 37 may be moved manually to any indication on the dial. The nut 36 is held from downward displacement by a plate 41 held in place by screws 42 passing through slots 43 in said plate. This plate has a key or projection which engages a'keyway in the spindle 44 as shown in Figs. 2and 8. The upper end of the spindle 44 is threaded into the nut 36. It will be evident that, with the nut 36 held stationary, the spindle 44 mayor soldering. They thus form a cylindrical pile of disks which touch each other onlv at their centers. At those central points, the interior of each disk is in communication with the interior of the next adjacent disk by the central row of openings shown in Fig. 2. Otherwise the disks are closed so that there is no communication between the interior and the exterior of the disks. The interior of the disks is then filled with a volatile fluid.

The pile of disks so formed constitutes a compound diaphragm made up of twice as many simple diaphragms as there is disks, and it will be evident that each simple diaphragm has an exposed 'surface equal to its area through which heat may pass to cause expansion or contraction of the inclosed fluid. It will also be evident thatthe expansion or contraction of the pile will be the aggregate expansion or contractionof all of the simple diaphragms.

gages the nut 36.

i set on the dial 40 so that it will point to the Secured to the bottom of the compound diaphragm is a nut 52 which serves to hold the body 33 securely in place against a shoulder on the stem 34, and also to secure this stem to the diaphragm. Secured to the top of the diaphragm is a spindle -1 which en- From the connections from the body to the nut 36, it will be evident that any expansion of the compound diaphragm will move the body 33 downward, while any contraction of the diaphragm will move it upward. It will be further evident that for any given temperature of the diaphragm, any movement of the pointer 37, and consequently of the nut 36, will cause a corresponding upward or downward movement of the body 33. These upward and downward movements of the body 33 arepermitted by the longitudinal sliding of the stem 34 in the guiding opening within which it is held. The block 16, which provides this guiding opening and the chambers and 26, is held in place by screws 47 entering tapped'holes 48 in the base 11. Secured to the block -16 and extending in a curved position over the ports 49 and 50 are deflecting plates 51.

lVhen the handle 20 is moved to open the ports 23 and 24, streams of hot and cold water flow upward past the valves 29 and 30 into the casing 10. Here these streams impinge upon the deflecting plate 51 and are given a circular movement which causes them to mix as they flow around and in contact with the compound diaphragm. Above the diaphragm the mixed hot and cold water flows through the openings 53 in the wall of the casing 10 to the channel 54 and thence out of the nozzle 55. The expansion or contraction of the diaphragm will be determined by the temperature of the mixture, and this in turn will be determined by the relative temperatures of the hot and cold streams and the extent to which the valves 29 and 30 are opened. If, after the handle 20 is moved and the flow begins, the temperature of the mixture is greater than the temperature of the water in the casing 10 at the time the valves 15 and 16 were opened, the diaphragm will expand and move the body 33 downward, the result of which will be to lessen the flow of hot water and increase the flow of cold water. It will be evident that as the mixed streams flow around the diaphragm the expansion and contraction of the diaphragm, and the relative opening and closing of the valves 29 and 30 will balance and water of uniform temperature will flow from the nozzle 55. If, without changing the position of the diaphragm or the body 33, the pointer 37 be designation corresponding to that temperature, the pointer will indicate the temperature flowing from the nozzle. If the mixture in the casing should become hotter or colder by reason of varlatlons 1n tempera- .ture in the streams entering through the ports 19 and 50, such change would act to expand or contract the diaphragm and thereby to change the relative volumes of hot and cold water entering the casing. In other words, the diaphragm will act to auto matically maintain a uniform temperature of water flowing from the nozzle, no matter how much the relative temperatures of the entering streams may vary.

If, after the pointer 37 has been set as before described, it be moved on the dial 4:0 to some other designation, such movement will turn the nut 36 and cause a corresponding vertical movement of the diaphragm. This change in the position of the diaphragm will cause a mechanical change in the position of the body 33 and consequently a change in position of the valves 29 and 30 and a corresponding change in the relative volumes of the hot and cold streams. This in turn will cause an expansion or contraction of the diaphragm which will come to a balance in its new position and result in delivering water at a temperature corresponding to this new balance. If the dialbe so graduated that the pointer in its new position indicates the new temperature, then the parts will be calibrated so that a manual movement of the pointer to any indication on the dial will cause water of a correspond ing temperature to flow from the nozzle.

The calibration by which the pointer 37 is made to indicate the proper temperature may be accomplished by making the pointer adjustable on the nut 36, by'making the dial 40 adjustable on the head 39, or by adjusting the plate 41 with respect to the screws 42. In this last method of adjustment the dial and pointer are fixed with the pointer at some definite designation as 90. The plate 41 is then shifted to turn the screw threaded spindle and consequently raise or lower the diaphragm until its expansion under 90 degrees of temperature will produce the proper control of the Valves 29 and 30. By using a compound diaphragm with large surface such as described, small variations of temperature will cause considerable movement of the valves 29 and 30 with the result that variations in temperature of the water discharged from the nozzle will be confined within narrow limits even when there are great variations in the temperature of the streams entering through the openings 21 and 22. This sensitiveness of the diaphragm is particularly advantageous in avoiding accidental scalding in case the cold water supply should happen to be out off at some point before reaching the valve 16. In such a case nothing but hot water would enter the mixing chamber 10. By having a sensitive diaphragm and by the proper adjustment of parts, the diaphragm will completely close the valve 29 when the temperature in the chamber rises to the fixed point for which the device is initially set.

What I' claim is 1. In a thermostatic water device, a mixing chamber provided with inlets for hot and cold water and an outlet for a mixture of the same, a valve in each inlet, a lever provided with connections for the simultaneous opening and closing of said valves, additional valves in each inlet between the first named valves and the mixing chamber, a thermostatic device within the chamber, and connections from the thermostatic device to the last named valves for moving them simultaneously in opposite directions.

2-. In a thermostatic valve, a base having inlets for hot and cold water, a valve in each inlet, a hand lever having connections to both valves for simultaneously opening and closing them, a mixing chamber having inlets connecting to the inlets in the base, a valve in each of the chamber inlets, a thermostatic device in the chamber, and connections from the thermostatic device to the last named valves for moving them.

at. In a thermostatic valve, a mixing cham ber provided with inlet openings for hot and cold water, a thermostatic device for regulating the flow of Water through said openings, and means by which water entering said chamber through said inlets is given a circular movement around said thermostatic device.

Signed at Chicago, Illinois this 26th day of February 1913.

JAMES J. FINNEY.

Witnesses:

WALTER H. REDFIELD, C. L. REDFIELD. 

